Site Map

Urine pH test

pH - urine

A urine pH test measures the level of acid in urine.

Images

Female urinary tract
PH urine test
Male urinary tract

I Would Like to Learn About:

How the Test is Performed

After you provide a urine sample, it is tested right away. The health care provider uses a dipstick made with a color-sensitive pad. The color on the dipstick tells the provider the level of acid in your urine.

How to Prepare for the Test

Your provider may tell you to stop taking certain medicines that can affect the results of the test. These may include:

DO NOT stop taking any medicine before talking to your provider.

Eat a normal, balanced diet for several days before the test. Note that:

How the Test will Feel

The test involves only normal urination. There is no discomfort.

Why the Test is Performed

Your provider may order this test to check for changes in your urine acid levels. It may be done to see if you:

Normal Results

The normal values range from pH 4.6 to 8.0.

The examples above are common measurements for results of these tests. Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test results.

What Abnormal Results Mean

A high urine pH may be due to:

A low urine pH may be due to:

Risks

There are no risks with this test.

Related Information

Acid loading test (pH)
Kidney stones
Uric acid - blood
Urinary tract infection - adults
Gastric suction
Acute kidney failure
Proximal renal tubular acidosis
Nausea and vomiting - adults
Chronic obstructive pulmonary disease (COPD)
Diabetic ketoacidosis
Diarrhea
Alkalosis
Interstitial nephritis
Distal renal tubular acidosis
Sepsis

References

Bushinsky DA. Kidney stones. In: Melmed S, Auchus RJ, Goldfine AB, Koenig RJ, Rosen CJ, eds. Williams Textbook of Endocrinology. 14th ed. Philadelphia, PA: Elsevier; 2020:chap 32.

Fogazzi GB, Garigali G. Urinalysis. In: Feehally J, Floege J, Tonelli M, Johnson RJ, eds. Comprehensive Clinical Nephrology. 6th ed. Philadelphia, PA: Elsevier; 2019:chap 4.

Hamm LL, DuBose TD. Disorders of acid-bace balance. In: Yu ASL, Chertow GM, Luyckx VA, Marsden PA, Skorecki K, Taal MW, eds. Brenner and Rector's The Kidney. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 16.

Riley RS, McPherson RA. Basic examination of urine. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 29.

BACK TO TOP

Review Date: 7/19/2021  

Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

ADAM Quality Logo
Health Content Provider
06/01/2025

A.D.A.M., Inc. is accredited by URAC, for Health Content Provider (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics. This site complies with the HONcode standard for trustworthy health information: verify here.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2022 A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

A.D.A.M. content is best viewed in IE9 or above, Firefox and Google Chrome browser.